Vision 2025 - National Research Centre for Grapes

Fig. 9. Improved performance of grafted vines
(Right) as compared to own rooted (Left)
at reduced level of irrigation
• In the variety Tas-A-Ganesh, retention of only 35
shoots after back pruning and maintaining 40
bunches per vine after forward pruning was found to
be optimum for obtaining significantly higher yield,
berry weight and berry diameter. Similarly, clipping
a flower cluster up to 35%, gave higher yield with
quality bunch.
• In Tas-A-Ganesh horizontal single cordon training
modification recorded higher yield and lower disease
incidence than double cordon system on flat roof
gable system of training.
• Tas-A-Ganesh vines grafted on Dogridge rootstock and trained with double stem on flat roof
gable training system performed better as compared to single stem under the same system
of training.
• Growth stage wise fertilizer application through drip (fertigation) in grafted Thompson
seedless vines resulted in 60% savings in fertilizer use over the conventional method of soil
application, thus improving fertilizer use efficiency and reducing salinity hazard and
pollution of ground water.
• An irrigation schedule based on pan evaporation and growth
stages of grafted grape vines have been developed for optimal
water use in grapes. The schedule improves the water use
efficiency by almost 141 per cent.
• Tas-A-Ganesh grafted on rootstock showed better water use
efficiency compared to own rooted vines and resulted in the
saving of 25% irrigation water.
• Use of subsurface irrigation and mulch + Antistress resulted in
improved water use efficiency and lead to saving of 25% of
irrigation water on grafted vines.
• Rootstock B2/56, resembling 110 R was found to have better salt exclusion as indicated by
lower sodium content in petiole of Thompson Seedless vines grafted on this rootstock. The
yield was also highest in vines grafted on this rootstock.
• Black leaf disorder observed in many vineyards were attributed to
low potassium content and / or excess sodium
• The shiny spot symptoms and marginal necrosis of leaf blade were
found to be due to potassium deficiency.
Fig. 10. Subsurface irrigation
• DRIS norms for the vineyards, based on petiole nutrient contents
were developed. Among the different diagnostic parameters, P/N,
Fig. 11. Black leaf disorder
K/N, P/Zn had greater physiological rationale during flowering
stage whereas N/P and N/K were critical during bud differentiation stage.
• The stages and doses of the bioregulators (Uracil, 6-BA, GA 3 and CPPU) for improving
bunch and berry quality have been standardized on Thompson seedless and Tas-A-Ganesh
vines. Efficacy of gibberellic acid could be improved by using adjuvents like phosphoric
acid and urea phosphate in acidic range.
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